JP3677919B2 - Threshing device - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a threshing device provided in a combine harvester or the like.
[0002]
[Prior art]
In the publicly known JP-A-8-289659, a threshing chamber in which a handling cylinder is mounted by a handling cylinder shaft, a second processing chamber in which a second processing cylinder provided on the side of the threshing chamber is mounted, It describes a threshing apparatus having a threshing chamber and a swing sorting shelf provided below the second processing chamber.
[0003]
[Problems to be solved by the invention]
In the known example, since the second processing device is simply provided on the side of the threshing chamber, the threshing falling from the threshing chamber and the processed material of the second processing device are offset and fall to the swing sorting shelf below. There is a problem.
[0004]
OBJECT OF THE INVENTION
Dispersion of fallen objects from the threshing chamber and the second processing device, swing selection and even supply to the wind selection chamber, improvement of sorting efficiency and accuracy.
[0005]
[Means for Solving the Problems]
In the present invention, a threshing chamber (2) in which a handling cylinder (3) is mounted by a handling cylinder shaft (4), and a dust removal processing cylinder (19) provided on a side portion of the threshing chamber (2 ) are mounted. A second treatment chamber (25) having a dust removal treatment chamber (18) and a second treatment drum (26) mounted thereon, the threshing chamber (2), the dust removal treatment chamber (18), and the second treatment chamber ( 25) In the threshing apparatus having a swing sorting shelf (10) provided below 25), the end portion of the threshing chamber (2) and the starting end portion of the dust removal treatment chamber (18) are connected by a communication port (23). The processing blade (20) facing the communication port (23) among the dust processing blades (20) provided on the outer peripheral surface of the dust processing cylinder (19) is configured to be spiral so as to have a feeding action. The dust discharge port (24) at the end of the dust removal processing chamber (18) faces the upper position on the terminal end side of the swing sorting shelf (10), and the dust discharge treatment cylinder 19), a second processing cylinder (26) located on the front side of the dust removal processing cylinder (19) is provided on the same axis as the dust processing cylinder (19), and the second processing cylinder (26) is more than the dust processing cylinder (19). The second processing cylinder (26) and the dust removal processing cylinder (19) are detachably attached in the axial direction, and the second processing chamber (25) is formed on the second processing cylinder (26). The upper side is mainly opened, and the lower side is surrounded by the second processing chamber (29), respectively. The upper discharge port of the second item return device (27) is formed at the start end of the second processing chamber (25). (47) is connected, and the second processed material discharge port (46) at the end of the second processing chamber (25) faces the upper end of the transfer shelf 11 of the swing sorting shelf (10), and A vertical guide plate (50) for partitioning the second processing chamber (25) and the threshing chamber (2) is provided above the number processing chamber (25). The upper end of the plate (50) is fixed at a position closer to the threshing chamber (2) side than the second processing chamber (25), and is inclined so as to approach the second processing chamber (25) side as it goes downward. The cereal removal is carried out on the transfer shelf (11) of the swing sorting shelf (10) below the transfer end of the second processing cylinder (26) of the second processing chamber (25). Threshing device provided with a gathering plate (48) to be brought to the opposite side of the numbering treatment chamber (25), and a starting end portion of the gathering plate (48) being located at substantially the same position as a terminal end portion of the second treating cylinder (26). It is what.
[0006]
【Example】
An embodiment of the present invention will be described with reference to an example of a combine. Reference numeral 1 denotes a threshing device, a threshing chamber 2 is provided at one upper part of the threshing device 1, and a handling cylinder 3 is provided in the threshing chamber 2. It is mounted by the barrel 4. The barrel 4 is mounted on the start side plate 5 and the threshing chamber end side plate 6. The lower side of the handling cylinder 3 is surrounded by a handling net 7. 8 is an air blower, 9 is a wind selection chamber, 10 is a swing sorting shelf that swings in the air blowing direction of the air blower 8, 11 is a transfer shelf at the start of the swing sorting shelf 10, and 12 is an upper surface of the transfer shelf 11. A transfer protrusion for transferring the fallen material from the treatment net 7 formed, 13 a sieve for selecting grains and foreign matters, 14 a strolack capable of transferring sawdust, 15 a first conveyor, and 16 a second conveyor , 17 is a suction dust exhaust fan (cross flow suction fan).
[0007]
A dust disposal chamber 18 is provided at the end of the threshing chamber 2. The dust treatment chamber 18 is provided with a dust treatment blade 20 on the outer peripheral surface of the dust treatment cylinder 19 parallel to the handling cylinder 3, and mainly surrounds the lower side of the dust treatment cylinder 19 with a dust treatment net 21. Constitute. The dust removal processing chamber 18 is overlapped with the terminal end of the threshing chamber 2 in plan view and communicated with the communication port 23 (FIG. 3). A dust exhaust port 24 is formed at the end of the dust processing chamber 18 (FIG. 4), and the dust exhaust port 24 faces the position above the end of the sheave 13 of the swing sorting shelf 10. The processing blade 20 facing the communication port 23 and the dust discharge port 24 on the start end side of the dust discharge processing blade 20 is provided with a plate member so as to incline spirally so as to have a function of feeding dust. The middle part of the dust removal blade 20 is formed by forming a U-shaped shape with a wire member having a square columnar cross section by a normal punching process in the circumferential direction (FIG. 5). The cutting performance of the branch kerf is improved with the expectation of cutting of sawdust by the part. In addition, a guide body 21 a is provided on the outer periphery of the dust collection treatment net 21 so as to protrude in the radial direction of the dust collection treatment cylinder 19, and the processed material leaked from the dust collection treatment net 21 is diffused into the wind selection chamber 9. In addition, since the wind generated by the rotation of the dust exhausting cylinder 19 blows along the guide body 21a, the wind generated by the dust exhausting cylinder 19 is diffused with respect to the swing sorting shelf 10, and as a result, 8 blows out easily and improves the sorting performance. The guide body 21a of the embodiment is formed integrally with the weft line 21b of the dust disposal processing net 21 so as not to interfere with the leakage of the processed material. Reference numeral 21c denotes a warp line of the dust removal treatment network 21, and reference numeral 21d denotes an upper cover.
[0008]
A second processing chamber 25 is provided at the side of the threshing chamber 2, and the second processing drum 26 and the dust removal processing drum 19 of the second processing chamber 25 are arranged on the same axis. The second processing chamber 25 is for processing a second product collected and supplied by a second product return device 27 connected to the end of the second conveyor 16, and the second processing drum 26 is the dust discharge processing drum 19. The second processing cylinder 26 is provided with a second processing blade 28 on the outer peripheral surface of the second processing cylinder 26, and the lower side of the second processing cylinder 26 is surrounded by a non-porous second processing cylinder 29. .
The dust removal treatment cylinder 19 and the second treatment cylinder 26 are provided coaxially, but the configuration thereof is arbitrary. For example, fitting bodies 31 and 32 are provided on the respective start end sides ( FIG. 6) is provided so as to be detachable in the axial direction by a so-called coupling configuration in which fitting shafts 33 and 34 that are splined to the fitting bodies 31 and 32 are fitted. A metal 35 is attached to an intermediate plate 36 provided between the start side plate 5 and the threshing chamber end side plate 6, and the fitting shaft 33 is attached to the metal 35 so as to be rotatable only. Reference numeral 37 denotes an insertion port formed in the intermediate plate 36 so as to pass through the second processing cylinder 26 from the insertion port 37. Reference numeral 38 denotes a protruding shaft portion that protrudes from the metal 35 toward the second processing cylinder 26 and serves as a second processing cylinder shaft. Reference numeral 39 is a bearing member, 40 is an input pulley, 41 is a processing cylinder terminal shaft, 42 is a side plate, and 43 is a bearing member. Accordingly, when the dust removal processing cylinder 19 is pulled by removing the processing cylinder end shaft 41 from the bearing member 43, the fitting body 31 can be detached from the fitting shaft 33, and then the metal 35 can be removed from the intermediate plate 36. When removed, the second processing cylinder 26 can be removed from the insertion port 37.
[0009]
Thus, the upper discharge port 47 of the second object return device 27 is connected to one end (starting end, right side in FIG. 2) of the second processing chamber 25, and the other end (termination, in FIG. 2) of the second processing chamber 25. On the left side, a second processed product discharge port 46 is formed, and the second processed product discharge port 46 faces the transfer shelf 11 at the start end of the swing sorting shelf 10.
On the transfer shelf 11, a gathering plate 48 for bringing the cereals on the transfer shelf 11 closer to the center is provided. The close-up plate 48 is inclined so that the starting end portion thereof is located on the side of the second processed material discharge port 46 in plan view, and is located on the side opposite to the second processed material discharge port 46 as it reaches the end, and is integrated with the transfer shelf 11. Provided so as to swing.
In the embodiment, the second processing chamber 25 transfers the processed material in the opposite direction to the threshing movement direction in the threshing chamber 2, and the second processed material discharge port 46 is disposed on the start end side of the threshing chamber 2. In addition, since it is arranged on the rotationally rising side of the barrel 3, the start end (front end) of the approach plate 48 is the start end of the second processed material discharge port 46 (based on the second processing chamber 25). Therefore, it is positioned substantially below the rear end).
Accordingly, the threshing in the threshing chamber 2 falls on the transfer shelf 11 on the second processing chamber 25 side by the action of gravity and the centrifugal force that rotates together with the rotation of the handling cylinder 3, and is discharged from the second processed material discharge port 46. The processed material is brought close to the second processing chamber 25 side by the gathering plate 48 and supplied evenly in the width direction of the wind selection chamber 9.
In FIG. 2, there is a gap between the lower edge of the gathering plate 48 and the transfer shelf 11 for the convenience of drawing, but in practice, the contact plate 48 is substantially in close contact, and the length and inclination of the gathering plate 48 are up to Further, the end of the gathering plate 48 may be rotated with reference to the starting end.
[0010]
Therefore, a partition plate 49 is provided above the communication port 23 that is a communication portion between the dust disposal chamber 18 and the threshing chamber 2. The lower part of the partition plate 49 is formed in an arc shape along the outer periphery of the upper part of the rotation locus of the dust removal treatment blade 20 of the dust removal treatment cylinder 19, and the upper part is located on the side of the handling cylinder 3.
Further, although the upper part of the second processing chamber 25 is open, a guide plate 50 that partitions the second processing chamber 25 and the threshing chamber 2 is provided above the second processing chamber 25. The guide plate 50 is fixed so that the upper end of the guide plate 50 is closer to the threshing chamber 2 than the second processing chamber 25, and closer to the second processing chamber 25 side as it goes downward, so that it faces the center of the second processing cylinder 26. Tilt to.
58 is a circular partition member provided at the start end of the second processing cylinder 26, 59 is a shield member surrounding the periphery of the circular partition member 58, and partitions the dust removal processing chamber 18 and the second processing chamber 25 from each other. Reference numeral 60 denotes a guide plate provided below the communication port 23.
Also, in the figure, 61 is a combine body frame, 62 is a traveling device, 63 is a cutting part, 64 is a weed body, 65 is a grain feeder, 66 is a grain basket that supplies the tip side of the grain to the threshing chamber 2 Feeding and conveying device, 67 is a cutter for finely cutting the threshed waste, 68 is a glen tank provided on the side of the threshing chamber 2, 69 is a discharge cerealing device, 70 is a discharge auger, 71 is a cabin, 72 is a cereal It is a spear.
[0011]
Next, the operation of the embodiment will be described.
When the cereal is supplied to the threshing chamber 2, the threshing is carried out by the rotating handling cylinder 3 in the threshing chamber 2, and the threshed grains fall from the handling net 7 onto the transfer shelf 11 of the swing sorting shelf 10, 11 is transferred to the wind sorting chamber 9 and separated on the sheave 13 of the swing sorting shelf 10 by the swinging sheave 13 and the blown air from the blower 8 to separate the chips and grains. The grain falls from the gap between the sheaves 13 and is first taken out of the machine from the conveyor 15.
In addition, the threshing object to be processed that does not fall from the handling net 7 enters the dust treatment chamber 18 through the communication port 23 at the end of the threshing chamber 2 and is processed by the dust treatment blade 20 of the rotating dust collection cylinder 19. The processed grain falls below the dust collection network 21 and is wind-selected in the wind selection chamber 9, and the sawdust that does not fall from the dust collection network 21 falls from the dust outlet 24 and wind. Once selected, the grains in the sawdust fall and the sawdust is discharged outside the machine.
[0012]
In this case, since the dust disposal chamber 18 is provided on the side of the barrel 3 below the barrel shaft 4, the dust disposal chamber 18 is efficiently put into the dust disposal chamber 18 and processed. That is, the threshing in the threshing chamber 2 tends to gather obliquely downward with respect to the handling cylinder shaft 4 due to the action of gravity and the centrifugal force rotating together with the rotation of the handling cylinder 3. By disposing the dust disposal chamber 18 on the side of the body 3, the supply to the dust disposal chamber 18 is made smooth.
In addition, since waste dust or the like does not fall from the gap of the sheave 13, it moves to the discharge side by the swing of the swing sorting shelf 10 and the air blown by the air blower air blower 8. Sawdust is removed by suction by the suction dusting fan 17, and the sawdust that is not sucked by the suction dusting fan 17 reaches the Strollac 14, and the soot that does not fall from the Strollack 14 is discharged out of the machine.
[0013]
Thus, the cuts of the ears, the branch sticky grains, etc. dropped by the swing of the swing sorting shelf 10 are collected by the second conveyor 16, and the second processing chamber 25 is moved from the end of the second conveyor 16 by the second object return device 27. Sent to.
In the second processing chamber 25, the second processing blade 28 of the rotating second processing cylinder 26 is sent to the start end side of the threshing chamber 2 by the second processing blade 28 and processed by the second processing blade 28 while being fed. The processed grain and the second processed product fall on the transfer shelf 11 of the swing sorting shelf 10 from the second processed product discharge port 46 and are again sorted by swinging and wind.
In this case, as described above, the threshing in the threshing chamber 2 is collected by dropping to one side where the second processing chamber 25 is provided by the action of the centrifugal force that rotates together with the gravity and the rotation of the barrel 3. When the second processed material from the second processed material discharge port 46 of the second processing chamber 25 merges, the second processed material is shifted to one side. Since an upright gathering plate 48 that is inclined in plan view is provided so as to be located on the outlet 46 side and to be located on the opposite side of the second processed material discharge port 46 as it reaches the end, it is provided from the second processed material discharge port 46. The second processed material is guided from the center to the other side by the collecting plate 48, and the threshing in the threshing chamber 2 is on one side of the transfer shelf 11 and the second processed material from the second processed material discharge port 46 is on the other side. In this state, it is dispersed and supplied to the wind sorting chamber 9. That is, the threshing in the threshing chamber 2 that has fallen to the second processed material discharge port 46 side from the collecting plate 48 is transferred as it is without hitting the collecting plate 48, but the second processed material from the second processed material discharge port 46 is transferred. Since it hits the gathering plate 48, it is brought closer to the anti-second processed material discharge port 46 side and dispersed.
[0014]
Therefore, the grain removal on the transfer shelf 11 is efficiently dispersed, and the sorting efficiency and accuracy in the wind sorting chamber 9 are improved.
Thus, the upper portion of the second processing cylinder 26 may be closed, but if left open, branch rachis adhering grains and the like leaking from the handling net 7 of the threshing chamber 2 enter the second processing chamber 25 and be processed. Therefore, the sorting accuracy and sorting efficiency are improved. That is, when the second processing chamber 25 is arranged at the lower position on the rotation rising side of the handling cylinder 3 with respect to the threshing chamber 2, especially when the threshing load is large and the handling cylinder 3 rotates faster, the threshing chamber 2 is scattered. Although the threshing enters the second processing chamber 25 and is expected to improve the threshing efficiency and accuracy, the threshing shift on the transfer shelf 11 is dispersed by the gathering plate 48, so the threshing chamber The arrangement of 2 and the second processing chamber 25 is also effective.
In addition, since a non-porous second article treatment rod 29 is provided below the second treatment cylinder 26, the second article supplied by the second article return device 27 is prevented from dropping before it is processed. Thus, the processing efficiency is improved.
[0015]
Therefore, a partition plate 49 is provided above the communication port 23, which is a communication portion between the dust removal treatment chamber 18 and the threshing chamber 2, and the partition plate 49 surrounds the upper outer periphery of the dust removal treatment cylinder 19. Therefore, the threshing material to be processed is smoothly and reliably taken into the dust removal treatment chamber 18 from the communication port 23 and is prevented from being scattered together with the dust removal treatment cylinder 19 to the threshing chamber 2 side. Backflow from the dust processing chamber 18 to the threshing chamber 2 is prevented. In particular, the sawdust that is rotating together with the handling cylinder 3 hits the partition plate 49 and is smoothly and surely taken into the dust treatment chamber 18 from the communication port 23. Decrease.
Further, since the partition plate 49 is located not only at the upper part of the dust removal processing cylinder 19 but also at the upper part thereof at the side of the handling cylinder 3, when the upper part of the dust removal treatment cylinder 19 is simply surrounded, Dust and the like are deposited on the upper side of the processing cylinder 19, but this is prevented.
[0016]
In addition, if the upper part of the second processing chamber 25 is simply opened, a part of the second processing chamber 26 may be blown by the second processing cylinder 26 and partly flow back into the threshing chamber 2, but above the second processing chamber 25, Since the guide plate 50 for partitioning the second processing chamber 25 and the threshing chamber 2 is provided, the upper portion of the second processing chamber 25 is opened, and expectation of branch rachis adhering particles scattered from the threshing chamber 2 is entered. The backflow from the second processing chamber 25 to the threshing chamber 2 can be prevented.
In addition, when the upper part of the second processing chamber 25 is opened, the second thing supplied by the second thing returning device 27 may scatter and enter the threshing chamber 2. The upper discharge port 47 of the second thing return device 27 is opened, and the flow path from the upper discharge port 47 to the second treatment chamber 25 and the threshing chamber are provided by the guide plate 50 that partitions the second treatment chamber 25 and the threshing chamber 2. 2, the second product discharged from the upper discharge port 47 is guided by the guide plate 50 and enters the second processing chamber 25, and does not flow back to the threshing chamber 2.
[0017]
【effect】
In the present invention, a threshing chamber (2) in which a handling cylinder (3) is mounted by a handling cylinder shaft (4), and a dust removal processing cylinder (19) provided on a side portion of the threshing chamber (2 ) are mounted. A second treatment chamber (25) having a dust removal treatment chamber (18) and a second treatment drum (26) mounted thereon, the threshing chamber (2), the dust removal treatment chamber (18), and the second treatment chamber ( 25) In the threshing apparatus having a swing sorting shelf (10) provided below 25), the end portion of the threshing chamber (2) and the starting end portion of the dust removal treatment chamber (18) are connected by a communication port (23). The processing blade (20) facing the communication port (23) among the dust processing blades (20) provided on the outer peripheral surface of the dust processing cylinder (19) is configured to be spiral so as to have a feeding action. The dust discharge port (24) at the end of the dust removal processing chamber (18) faces the upper position on the terminal end side of the swing sorting shelf (10), and the dust discharge treatment cylinder 19), a second processing cylinder (26) located on the front side of the dust removal processing cylinder (19) is provided on the same axis as the dust processing cylinder (19), and the second processing cylinder (26) is more than the dust processing cylinder (19). The second processing cylinder (26) and the dust removal processing cylinder (19) are detachably attached in the axial direction, and the second processing chamber (25) is formed on the second processing cylinder (26). The upper side is mainly opened, and the lower side is surrounded by the second processing chamber (29), respectively. The upper discharge port of the second item return device (27) is formed at the start end of the second processing chamber (25). (47) is connected, and the second processed material discharge port (46) at the end of the second processing chamber (25) faces the upper end of the transfer shelf 11 of the swing sorting shelf (10), and A vertical guide plate (50) for partitioning the second processing chamber (25) and the threshing chamber (2) is provided above the number processing chamber (25). The upper end of the plate (50) is fixed at a position closer to the threshing chamber (2) side than the second processing chamber (25), and is inclined so as to approach the second processing chamber (25) side as it goes downward. The cereal removal is carried out on the transfer shelf (11) of the swing sorting shelf (10) below the transfer end of the second processing cylinder (26) of the second processing chamber (25). Threshing device provided with a gathering plate (48) to be brought to the opposite side of the numbering treatment chamber (25), and a starting end portion of the gathering plate (48) being located at substantially the same position as a terminal end portion of the second treating cylinder (26). Therefore, the second processed material discharged from the second processing chamber 25 strikes the counter plate 48 and is moved to the counter-second processed material discharge port 46 side, and the second processed material discharge port 46 side from the counter plate 48. The threshing in the threshing chamber 2 that has fallen to the top is transported as it is without hitting the gathering plate 48. The above threshing can be efficiently dispersed, the sorting loss in the wind sorting chamber 9 can be reduced, the sorting efficiency and accuracy can be improved, and the dispersing device can be configured with a simple configuration in which the gathering plate 48 is provided. There is also an effect of not increasing the cost.
In the present invention, a guide plate 50 that partitions the second processing chamber 25 and the threshing chamber 2 is provided above the second processing chamber 25, so that the upper portion of the second processing chamber 25 is opened to the threshing chamber. In addition to expecting branch shoots adhering from 2 to enter, it is possible to prevent backflow from the second processing chamber 25 to the threshing chamber 2 .
[Brief description of the drawings]
FIG. 1 is a side view of a combine.
FIG. 2 is a longitudinal sectional view of a threshing apparatus.
FIG. 3 is a cross-sectional view of the vicinity of the communication port.
FIG. 4 is a cross-sectional view near the dust outlet.
FIG. 5 is a cross-sectional view in the vicinity of a dust removal treatment chamber and a perspective view of a dust removal treatment blade.
FIG. 6 is a cross-sectional view of the vicinity of the second processing chamber.
FIG. 7 is a cross-sectional view of the vicinity of the second processed material discharge port.
FIG. 8 is a cross-sectional view of the dust removal treatment cylinder and the second treatment cylinder in an attached state.
FIG. 9 is a cross-sectional view of a threshing apparatus.
FIG. 10 is a schematic side view of the same.
FIG. 11 is a schematic side view of the same.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Threshing apparatus, 2 ... Threshing chamber, 3 ... Handling cylinder, 4 ... Handling cylinder axis, 5 ... Start end side plate, 6 ... Threshing chamber end side plate, 7 ... Handling net, 8 ... Air blow trap, 10 ... Swing selection Shelf, 11 ... Transfer shelf, 12 ... Transfer protrusion, 13 ... Sheave, 14 ... Strolack, 15 ... First conveyor, 16 ... Second conveyor, 18 ... Dust treatment chamber, 19 ... Dust removal cylinder, 20 ... Drain Dust processing blade, 21 ... processing net, 21a ... guide body, 21b ... latitude line, 21c ... meridian of dust processing net 21, 21d ... upper cover, 23 ... communication port, 24 ... dust outlet, 25 ... second processing chamber , 26 ... second processing cylinder, 27 ... second object return device, 28 ... second object processing blade, 29 ... second object processing rod, 31, 32 ... fitting body, 33, 34 ... fitting shaft, 35 ... metal 36 ... Intermediate plate 37 ... Insertion port 38 ... Projection shaft 39 ... Bearing member 40 ... Input pulley 41 ... Processing cylinder end shaft 42 Side plate, 43 ... bearing member, 45 ... start end side of second product processing chamber, 46 ... second product discharge port, 47 ... upper discharge port, 48 ... side plate, 49 ... partition plate, 50 ... guide plate, 51 ... grain稈 Supply device, 52, 53 ... guide rail, 54, 55 ... frame, 56 ... bolt, 57 ... frame, 58 ... circular partition member, 59 ... shield member, 60 ... guide plate, 61 ... combine fuselage frame, 62 ... Traveling device, 63 ... Mowing unit, 64 ... Weeding body, 65 ... Grain supply device, 66 ... Grain supply / conveyance device, 67 ... Cutter, 68 ... Glen tank, 69 ... Discharge cerealing device, 70 ... Discharge auger , 71 ... cabin, 72 ... cereal bowl.

Claims (1)

A threshing chamber (2) in which a handling cylinder (3) is mounted by a handling cylinder shaft (4), and a dust removal processing chamber in which a dust removal processing cylinder (19) provided on the side of the threshing chamber (2) is mounted. (18) and a second processing chamber (25) shaft-mounted with a second processing cylinder (26), below the threshing chamber (2), the dust removal processing chamber (18) and the second processing chamber (25) In the threshing apparatus having the swing sorting shelf (10) provided in the threshing chamber (2), the end portion of the threshing chamber (2) and the start end portion of the dust removal treatment chamber (18) are communicated with each other through the communication port (23) Of the dust removal treatment blade (20) provided on the outer peripheral surface of the dust removal treatment cylinder (19), the treatment blade (20) facing the communication port (23) is formed in a spiral shape so as to have a feeding action. The dust discharge port (24) at the end of the dust treatment chamber (18) faces the upper position on the end side of the swing sorting shelf (10), and the dust discharge cylinder (19) A second processing cylinder (26) located on the side is provided in the same axial center as the dust removal processing cylinder (19), and the second processing cylinder (26) is formed to have a smaller diameter than the dust processing cylinder (19). The second processing cylinder (26) and the dust removal processing cylinder (19) are detachably attached in the axial direction, and the second processing chamber (25) is mainly located above the second processing cylinder (26). And the lower side is surrounded by a second treatment chamber (29), respectively, and the upper discharge port (47) of the second thing return device (27) is formed at the start end of the second treatment chamber (25). And the second processed material discharge port (46) at the end of the second processing chamber (25) faces the upper end of the transfer shelf 11 of the swing sorting shelf (10), and the second processing chamber (25) is provided with a vertical guide plate (50) separating the second processing chamber (25) and the threshing chamber (2), and the guide plate (50 Has its upper end fixed to a position closer to the threshing chamber (2) than a double-dip process chamber (25), provided to be inclined so as to approach the double-dip process chamber (25) side in accordance leading downwards, the On the transfer shelf (11) of the swing sorting shelf (10) below the conveyance end of the second processing cylinder (26) of the second processing chamber (25), the cereals are removed from the second processing chamber ( 25. A threshing device provided with a gathering plate (48) that is brought closer to the opposite side of 25), wherein the start end of the gathering plate (48) is located at substantially the same position as the terminal end of the second processing cylinder (26).

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